Type-writer paper-feed mechanism.



J. J. GHAPIN.

TYPE WRITER PAPER FEED MECHANISM.

APPLICATION FILED SEPT.2,1908.

1,067,304, Patented July 15, 1913.

m- 3 SHEETSSHEBT l.

J. J. CHAPIN.

TYPE WRITER PAPER FEED MECHANISM.

APPLICATION FILED SEPT. 2, 1908.

Patented July 15; 1913.

3 SHEETS-SHEET 2.

APPLICATION FILED SEPT. 2,1908.

Patented July 15, 1913.

3 SHEETS-45111131 3.

FATENT OFFICE.

JOHN J. CHAIPIN, 0F DETROIT, MICHIGAN, ASSIGNOR TO BURROUGHS ADDING MACHINE COMPANY, OF DETROIT, MICHIGAN, A CORPORATION OF MICHIGAN.

TYPE-WRITER PAPER-FEED MECI-IAN ISM.

Application filed September 2, 1908. Serial No. 451,364.

To all whom it may concern:

Be it known that I, JOHN J CI-IAr1N,.a citizen of the United States, residing at Detroit, in the county of Vayne and State of Michigan, have invented certain new and useful Improvements in Type-Writer Paper- Feed Mechanism. of which the following is a specit- 'ion. Y

The present invention relates to devices employed in connection with the feed and control of paper in a t-ypewriting machine and one object is to provide a constant line gage to assist the operatorin adjusting the paper.

Another object is .to simplify the con struction for pressing the feed rolls against the paper overlying the platen. A

A further objectis to vincrease the effectiveness and facility of operation of the means for relieving the paper sure of the feed rolls;

A further object is to provide a form of paper clamp improved in points of simplicity and effectiveness.

\Vith these and incidental objects in view the invention consists in certain novel features of construction and combinations of parts, the. essential elements whereof are of the presrecited in the appended claims and a preferred form of embodiment of which is describedin detail. hereinafter and fully illus trated in the accompanying drawings forming a part of this specification.

said drawings Figure 1 represents in front elevation the roller platen and the constant line gage with portions of the framework in cross section; Fig. 2 is a top plan view of the gage and parts of the supporting frame; Fig. 3 is a cross sect-ion of the same; Fig. 4 is a fragmentary top plan view of the typewriter 'carriageyFig. 5 is a fragmentary bottom plan view of the same; F ig.

dis a left side elevation of the carriage With track-bars shown in cross section; Fig. 7 is a cross section of the carriage from front to rear; Fig. 8 is a detached perspective View of the paper clamp appearing in Figs. 4.- and 7, one portion of the same being represented as broken away; Fig. 9 is a side elevation of a modified form of paper clamp, the supporting shaft being shown in-section as also the roller'platen; Fig. 10 is a top plan view of a modifiedform of line-spacing regulating devices; and Fig. 11 is a left side elevation of the same.

Referring first to the constant line gage the numeral 2 in Figs. 1, 2 and 3, designates the roller platen which is supported in any suitable manner in a laterally-shifting frame. It is to be underst-od that the typewriting machine to which this line gage is attached is of the front strike character. The line gage comprises a thin metal plate 8 which extends from side to side of the frame of the machine and is pivotally mounted upon the latter. Hinge members 4; are secured to side bars 5 of the supporting frame and down-turnedportions 6 of the gage plate are coupled to these hinge members by suitable pintles 7. Spiral springs 8 surrounding the pintles and engaged with the hinge members 4g and the gage plate seiwe to press the latter forward and against the platen. Its own resiliency also assists in pressing the plate against the platen. The gage plate extends on a slight upper central portion comprises two straight edge wings 9 marked with subdivisions for letter space gaging. These wings are separated by a depression. 10 in the plate which provides for the striking of the type against the paper and the running of the ink ribbon close to the platen. The extremities of the wings 9 are bent outward slightly as shown in Fig. 2 so that paper clamps will readily pass under or behind the gage plate slightly displacing the latter through its own resiliencv. I

.It will be seen that the above-described gage is of very simple construction and arrangement' and serves as a ready and accnrate means for adjusting the paper for the line on which writing is to'be done as Well as for the location of the individual 'imprints. The form and arrangement makes it possible to have a single piece gage of such extent as to provide for adjusting to long as well as short lines and locating letter spaces, without changing the position of the carriage.

Passing to the feed rolls for the paper there is carried in suitable brackets depending from the sides of the carriage a'supporting rod 12 on which are loosely mounted hubs of'the arms of each'pair are'spaced apart on the shaft and a fiatspring 15 overlies the upper side of the latterbetween Patented July 15,1913.

said hubs, said spring projecting-forward angle upwardly toward the center and its in pairs a series of arms 13'and 14. The 5 and rearward from the shaft and underlying tion is a spring plate 37 which iseurved' the outer por' on of the arms which are around under the roller and cut out for the offset from the hubs as shown in Fig. 5. passage of the latter, said spring plate This spring thus presses the arms toward thence extending for contact with the paper. 5 the platen while serving as a spacing saddle A modified form of paper clamp is illus- 70 between the arms. The arms in their outer trated in Fig. 9. A The construction at the, ends are notched to form bearings for shafts l forward end is the same but at the rear end l6 carrying'the feed rollers 17. For the instead of there being a sleeve embracing purpose of "releasing the paper from the the shaft 32 there'is an-integral portion of 10 pressure of these feed rollers the arms 18 the metal forming the body which is and 14 are formed with downwafd extenbent .over and curved around under the sions 18, the extensions of a pair of the arms h ft 32 a shown at 33 to engage the flatextending on opposite sides of a ro k Shaf tened side of the shaft. In either construc- 19 which is flattened where Sllflh extensions tion the engagement, of the spring with the l5 ng the extenslohs y g in cross flattened side of the shaft is suflicient to hold grooves of the shaft. Each extension lles on th lam normally down upon the paper. thg side of the shaft oppositethat where its At th a tim it will be obvious that a extends a W'lll T that 11 these clamps can be thrownback at any righ -angl t r f the Shaft W111 resllhlin time turning upon the shaft 32 when itis 20 v{Owing the arms and the said rollers y desired toget at the paper and furthermore h the Plateh against the tellsiol} Of h the clamps can be readily slid along the Spring The means 331d shaft to adjust them to different widths-of shaft are of the following description: There papen is Secured h l j end of the Shaft The mechanism for advancing the paper 25 an arm 20 whlch l a P notched step by step comprises a ratchet wheel 40 on in the lower side of the bifurcation as shown th pl'atem a pawl 1 pivoted to a Slide 42 in g- -Lohse1y mounted P the shaft and drawn by a spring 43 toward the ratchet 12 intermediate its length is a lever 21 which. Wheel a handle'lever 4 pivoted to t at h carries roller Stud 22 06cm barriage frame and working in. a horizontal 38 w ns blfurqatlon oi h arm 20 and plane and having a finger 45'bearing against adapted tohct Wlth P h hfi upon said slide 42. The latter is retracted by a the lower side of the said b1furcat1on to rock Spring 4 ll holding the pawl 41 the Shaft 19,a11d 11919359 the P P Th away from the ratchet. Upon operation of agement with said roller stud of the notch the handlevlever p Pawns h t r 85 in the lower side of the bifurcation serves ward and a projecting portion f the m to detalh the Parts 111 POsltlons for f h engages under a fixed stud 47- to prevent the P p free e -W n .overthrowof the platen' Misk 5,0 loos'e'on arm 9 the lever 21 15 f b a hh the platen journal has a guard-flange 51 for 23 wlth handle level 2 P1voted lhterme' regulating the 'extent of action of the pawl 40 dilate its length upon right'side bar of upon the ratchet. This disk 50 is adapted to 5 the chrnage 3 sa1d.1mk.15 connected assume one of five positio'ns,'for determining to f lever m rear of its and the respectively whether the feed shall be of 13 formed at both ends wlth finger 'three, two or one of the teeth of the ratchet, Knees i 25 and Normally the whether thefeed shall be discontinued en- 45 15 elevated and the handle 2. 'tirely and whether the ratchet shall be re- I lowered Pressure upon the handle 26 Obvl' lieved from the pressure of the usual detainously will serve to release the Paper Whereas m roller 54.. The disk is suitably inscribed Ph vupon handle 25 will restore the either on the side as shown in Fig. 6 or on Bald Pressure devmes to normal a top flange as shown'in Fig. 10 and 1s 50- Refen'ihg next the P p chunks, in equipped with a handle 55 by which to shift F g 7 P 9 fih devlces 111115" it. A spring plate 56 with a pin for engag-' f P h ngld body Ph' ing holes 57 in the'disk serves to retain the; havmg secured to It a Sleeve 31 adapted to disk in any one of its different positions, in Slide upon Shaft 32'wh1ch extends between the construction shown in Fig. 6. In the 55 the-Side bars of the carriage frame? This construction shown in Figs. 10 an 11 ev shaft is flattened on the underside and there Spring plate 56( engages notches 575111 One is secured to oneend of the sleeve 31'} collet e of the index flange and vthis same having formed mtegmliy i flat spring plate ,serves as an index finger. In 'si' s p slot 111 the'sleeveahd the construction shown in Fig. 6 an index 60 g g the flattened underside d "finger 60 is secured to the stud 58 which Shaft thus holding the clamp yieldin ysupports the arm 59 carrying theroller 54 atn rma or ae t e platen. The A springfil connects said arm 59 with a ward end of the bodyportion- 30 is formed 'stud on the carriage frame. A notched cam as a hanger 35 to support a .pre'sf lre roller edge 62 on the disk 50 is adapted to engage l5 6- Secured to m -h p lf- 'the journal stud of said roller 54 tomove and hold the latter away from the ratchet when the disk is moved to one extreme posithe combination with the supporting frame having side members shift-able paper carriage having a roller platen; of

between and pivotally mounted at oppo-' 5, and the laterally a single-piece line gage extending site ends upon the sides of said frame respectively and constantly bearing with yielding pressure against the roller platen.

2. In a machine of the character described paper feed mechanism comprising, in combination with a roller platen, a central supporting shaft, 21 pair of oppositely project- ;lng arms loosely mounted thereon, and offset toward each other intermediate their ends so that' the free ends thereof are brought into substantially the same transverse plane, feed roller carrying shafts supported by said arms and a spring straddling the central' shaft intermediate the mountings of the arms thereon and engaging the arms on the I sides of the latter away from the platen.

3. In-a machine of the character described, paper feed mechanism comprising in combination .with a roller platen, a central sup porting shaft, a pair of oppositely projecting arms loosely mounted thereon, feed roller carrying shafts supported by said arms, and a spring straddling the central shaft between the arms on the side of the shaft toward the platen and projecting for engagement with the outer ends of said arms and on the sides thereof away from the platen.

4. In a machine of the character described, the combination with a roller platen; of feed rollers y'ieldingly engaging the same, means for separating said rollers from the platen, the same including a lever pivot- .ed intermediate its ends and having a handleon each end.

5. In a machine oft-hecharacter described, the combination with a roller platen; of paper feed mechanism comprising a central supporting shaft, arms loosely mounted thereon and spring-pressed toward the platen, feed roller carryingshafts supported by said arms, a spreader shaft engaging the arms, a controlling lever pivoted intermediate its ends and having a handle on each end and. operating gconnections between said spreader shaft and said controlling lever.

6. In a machine of the character described, the combination with a roller platen, of independently mounted front and rear feed rollers yieldingly engaging the same, and means for separating said rollers from the platen, said means including a manipulative lever, a member for directly effecting a separation of the rollers from theplaten having a cam surface, and means operated by the lever engaging said surface.

the combination with aJoHer platen; of feed rollers yieldingly engaging the same,

7 In a machine of the character described,

and means for separating said rollers from the platen, the same including a lever pivoted intermediate its ends and having a handependently mounted front and rear feed rollers yieldingly engaging the same, and means for separating said rollers from the platen, said means including a manipulative lever and an arm having a pin and slot connection therewith operated thereby and through which the separation is effected, the slot having a retaining notch.

9. In a machine of the character described. the combination wit-ha roller platen; of feed rollers yieldingly engaging the same, and means for separating said rollers from the platen, said means including a manipulative lever, a second lever pivoted below the platen operatively connected to the firstnamed lever, and a cam arm operated by said second lever and through the medium of which the separation is effected.

10. In a -machine of the character described, the combination with a roller platen; of feed rollers yieldingly engaging the same, and means for separating said rollers-from the platen, said means includ-.

ing a manipulative lever, a second lever operatively connected therew1th,. and a cam arm operated by said second lever and through the medium of which the separation is effected, said cam arm" having a retaining notch. I

11. In a machine of the character described, the combination with a roller 'platen;.of paper feed mechanism comprising a central supporting shaft, arms loosely mounted thereon and spring-pressed toward the platen, feed roller carrying shafts supported by said arms, a spreader shaft engaging the arms, a controlling lever pivoted intermediate its ends and equipped at each end for manipulation, and operating connections between said spreader shaft and said controlling lever comprising a camarm on the spreader shaft w1th a retaining notch and a lever having a pin acting on said cam arm.

12. In a machine of the character described, the combination with a roller platen; of paper feed mechanism compr1sing a central supporting shaft, arms loosely mounted thereon and spring-pressed toward the platen, feed roller carrying shafts supported by said armsya spreader shaft enaging the arms, a controlling lever pivoted intermediate its ends and equipped at each end for manipulation, and operating com nections between said spreader shaft and saidcontrolling lever comprising a second lever linked to said controlling lever and journaled on the central shaft and having a laterally projecting pin or stud and a camarm secured to the spreader shaft and engaged by said stud and'having a detaining notch. p

13. In amachine of the character described, the combination of a roller platen, a supporting shaft flattened along one side, and a paper clamp comprising a sleeve adapted to turn on said shaft, and slotted lengthwise, a spring secured to said sleeve and extending within said slot into contact with the shaft to yieldingly hold the paper clamp toward the platen.

14. In a machine of the character described, in combination with a roller platen, a supporting shaft flattened along one side, and a paper clamp having a sleeve surrounding said shaft and a spring exscribed, in combination With tending lengthwise the sleeve to enga e the flattened side-of the shaft for yiel ingly holding the paper clamp toward the platen; 15. In a machine of the character dea roller platen, a supporting shaft flattened along one side and a paper clamp comprising a spring longitudinally engaging the shaft and having a collar surrounding the latter.

16. In a machine of the character described, in combination withv a roller platen, a supporting shaft flattened along one side, and a paper clamp having a sheet metal spring for engaging the shaft, the anchored end of which spring is bent sub stantially at right angles to the body thereof and surrounds the shaft.

JOHN J. OHAPIN.

Witnesses J. G. VINCENT, R. S. MIELERT.

Copies of this patent may be obtained for five cents each, by addressing the Washington, D. O.

Commissioner of Patents, 

